Active geo-replication is an Azure SQL Database feature that allows you to create readable secondary databases of individual databases on a server in the same or different data center (region). Incorrect Answers: C: Availability Zones are unique physical locations within a region. Each zone is made up of one or more datacenters equipped with independent power, cooling, and networking. Reference: https://docs.microsoft.com/en-us/azure/azure-sql/database/active-geo-replication-overview